Fix a portability issue with md_hasclreol().

Some games' implementation of md_hasclreol() poked around in ncurses
internals, which does not work for some ncurses build configuration.
Most games did not actually call md_hasclreol(), so it was removed.
There is a standard terminfo function which can retrieve the value of
the clr_eol capability, so this was used for rogue5.

rogue4/mdport.c

@@ -110,20 +110,6 @@ md_init(void)
 #endif
 }
 
-int
-md_hasclreol(void)
-{
-#ifdef CE
-    return((CE != NULL) && (*CE != 0));
-#elif defined (clr_eol)
-    return((clr_eol != NULL) && (*clr_eol != 0));
-#elif !defined(__PDCURSES__)
-    return(clr_eol != NULL);
-#else
-    return(TRUE);
-#endif
-}
-
 static int md_standout_mode = 0;
 
 void